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❖ Structures called spindle fibers are attached to the centromeres. Spindle fibers divide the genetic material in a cell (sister chromatids).
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Answer:
Only one species can fill an ecological niche because each niche is destined exclusively for each species, since its structure, physiology and behavior determine it.
Explanation:
An ecological niche is the way in which each species relates to its environment, to other species and takes advantage of the resources available for its development, being an exclusive and individual characteristic of that species.
The ecological niche is a concept that many consider abstract, since it is unique for a species. Each species has a physical structure, functioning and behavior that differentiates it from the others, which leads it to occupy a certain place within an ecosystem, which would be its ecological niche.
Learn more:
Ecological niche brainly.com/question/718384
C. To track the direction the outdoor sunflower heads were facing throughout the day.
Explanation:
The main aim of the experiment being conducted by Jane is to track the direction the outdoor sunflower heads were facing throughout the day.
The whole set up is designed to test the claim that sunflowers do follow the sun in the sky throughout the day.
- From experiment, Jill should be able to track the changes in the orientation of flower head throughout the day.
- This will rightfully support his claims .
learn more:
Experiment brainly.com/question/5096428
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All cells in the body have the same DNA and the same genes. In organs & tissues the expression changes.
The information stored in the order of bases is organized into genes: each gene contains information for making a functional product. The genetic information is first copied to another nucleic acid polymer, RNA (ribonucleic acid), preserving the order of the nucleotide bases. Genes that contain instructions for making proteins are converted to messenger RNA (mRNA). Some specialized genes contain instructions for making functional RNA molecules that don’t make proteins. These RNA molecules function by affecting cellular processes directly; for example some of these RNA molecules regulate the expression of mRNA. Other genes produce RNA molecules that are required for protein synthesis, transfer RNA (tRNA), and ribosomal RNA (rRNA).
